Cyclohexane is oxidized by `HNO_(3)` to produce

When copper is heated with cone. HNO_(3) It produces :

One mole of As_(2)S_(3) is oxidized by HNO_(3) to H_(3)AsO_(4) and H_(2)SO_(4). HNO_(3) is converted into NO. The moles of HNO_(3) required are :

Zinc and cold dil. HNO_(3) reacts to produce

When copper is heated with conc HNO_(3) it produces

When copper is heated with conc. HNO_(3) it produces

When copper is heated with conc. HNO_(3) it produces?